Spear



E. GRAY.

SPEAR. APPUCATION HLED APR. 14', 1921 Patented May 2, 1922.

0 I I IQVENZNf/LAZ ATTORNEYfi,

Tao srA-Tes;

4 IELLSWORTH GRAY, or KUMBLE, TEXAS.

SPEAR. f

To allwhomz't may concera: I j

Be it known'that I, ELLswoR'rn GRAY, a citizen of the United States,residing at I Humble, in the county of Harris and State this inventionhas particular relationqto wherein a has left hand threads. Threadedonto theof Texas, have invented certain new and useful Improvements in aspear, of which -the following is a specification.

This invention relates to certain new and useful improvements in aspear. v

One object of the inventiomis to provide a device of the characterdescribedspecially designed for use in with-drawing pipe which ma.becomefstuck in a well, bore.

'1 nother object is to provide a spear Which maybe readily letdown intoa well bore and which will enter the pipe to be" pulled and engagetherewith to withdraw the same, and also embodies means wherev by it maybe easily released from the pipe and withdrawn in case the pipe cannotbe pulled.' f A v A further feature resides invthe provision of a spearwhich is adapted for use either in deep or shallow wells. 2

With the above and other objects in'view certain novel features ofconstruc ion, operation and arrangement of parts, an example of'which isgiven in this specification and illustrated in the accompanyingdrawings,

Figure 1 isa vertical sectional view of the spear, andt Figure 2 is atransverse sectional view taken on the" line 22 of Figure 1.

Referring now more particularly to the drawings, the numeral 1designates the pipe to be pulled. The numeral 2 designates anactuating-shaft which has a central annular rib -3. The upper section ofthis shaft has right hand threads and the lower section upper 'end oftheshaft 2 there is a coupling 4 into which the lower end of the string ofpipe 5 is threaded. This string is used to let the spear down into, andwithdraw it from the well bore.

Threaded onto the upper right-hand threaded section of the shaft thereis a nut 6 formed with a lateral lug 7. Fitted over the shaft 2 beneaththe coupling' there is a tubular jaw 8 having a, vertical slot 9 in oneside in which the lug 7 runs. The inner contour of the jaw flaresdownwardly arid its periphery has annular engaging Specification ofLetters Patent:

Patented May 2,1922.

Application filed April 14', 1921. SeriaLNo. 461,363.

.teeth 10. Threaded onto the lower or left- -hand-threaded section ofthe shaft 2 there sleeve is recessed to receive the head 12,

forming the annular shoulder 13, againstwhich said-head'is adapted toabut.

In operation thespear is let down into the bore and the pointed headwill direct it into the pipe to be pulled. The jaw is of a. size to fitclosely within said pipe and when an upward pull is exerted on thestring 5 the teeth 10 will engage with said pipe and the jaw will bespread bythe upwardly tapering sleeve and held insecure engagement withthe pipe and the pipe thus withdrawn. In case the pipe is too tightlystruck to be pulled it becomes necessary to release andwithdraw thespear. The spear may be released bymotating 'the string in a righthand,or clockwise, direction. When so rotated-the nut 6 will be run upagainst the annular inwardly extending'flange 14 carried by the upperend of the jaw, and the -sleeve will be run downwardly until theshoulder 13 thereof abuts-against the head 12' and a continued rotationof the string and shaft,2 will cause the nut 6 to elevate the jaw andrelease it from the wedging eflect of said sleeve and it will be therebyreleased from the pipe and may be withdrawn.

What I claim is 1. A spear including an actuating shaft, a string to thelower end of which said shaft is attached, the upper and lower sectionsof said shaft being revcTsely threaded, a nut threaded onto the upperthreaded section, an expansible jaw fitted over said shaft and nut' andwhose upper end has an inwardly extending shoulder, means for preventingthe relative rotation of said nut and jaw, a tapering sleeve threadedonto the lower threaded section of said shaft and adapted to wedgebetween said shaft and aw to expand the latter, and a head carrledby thelower end of the shaft.

2. A spear including an actuating shaft,

7 a string to the lower end "of which said shaft is attached. the upperand lower sections of said shaft being reversely threaded, a nutthreaded onto the upper threaded section, an expansible jaw fitted oversaid shaft and nut and whose upper end has an inwardly extendingsl1oulder.means for preventing the relative rotation of said nut andjaw. a tapering sleeve threaded onto the lower threaded section of saidshaft and adapted to wedge between said shaft and jaw toexpand thelatter, and a head carried by the lower end of the shaft. said shaft.when rotated, operating to carry said sleeve against said head and alsoto carry said nut against said shoulder. whereby the jaw is withdrawnfrom the sleeve.

3. A spear including an actuating shaft having upper and lowersections.reverselythreaded,an expansible jaw fitted over said shaft, a taperinsleeve threaded onto the lower section and adapted to wedge between theshaft and jaw to expand the latter, means adapted to be actuated by theupper section of said shaft into engagement. with said jaw,SEllCl'Slltlft, when rotated, operating to force the sleeve away fromsaid jaw and acting through said means to release said jaw from saidsleeve.

4.1K spear including an actuating shaft having upper and lower sections.reversely threaded. an expansible jaw fitted over said shaft, a taperingsleeve threaded'onto the lower section and adapted to wedge between theshaft and jaw to expand the latter,

means" adapted to be actuatedby the upper.

section of said shaft into engagement with said jaw, said shaft. whenrotated, operatlng to force the sleeve away from said jaw and actlngthrough said m'eansito release said jaw from said sleeve, and means forrotating thewshaft.

5. A spear including an actuating shaft limits the. downward movement ofthe sleeve on'the shaft and 'a shoulder carried by said jaw, againstwhich the niitis adapted toengage to release the jaw from saidsleeve.

6. A spear including a shaft haying reversely threaded upper and lowersections,

.a nut threaded onto the upper sectiom a lat eral lug carried by thenut, a downwardly flared expansible' jaw fitted over' the shaft 1 i Iand nut and having a vertical slot in one side. into which the lug proects, an inwardly extending annular flange carried by l the upper end ofthe jaw, against which the nut is adapted to abut, an upwardly taperingsleeve threaded onto the lower section of the shaft and formed to enterand expand said jaw,.and a head carried by the lower endof the shaft.

In testimony whereof I have signed my.

name to this specification in the presence of two subscribing witnesses,

ELLSVVORTH GRAY. 'itnesses Y G; H. 'HARRIS,

J. D. CARR.-

